How to confirm the ground wire and zero wire with the electric pen
The method of measuring the zero line of the electric pen is: the big finger and the middle finger hold the electric pen, the index finger presses the cap or the pen hanger (do not touch the metal tip of the head to prevent electric shock), and the tip of the electric pen touches the wire respectively. If the sensor inside the electric pen If the light is on, it is the live wire, otherwise it is the neutral or ground wire.
But the live wire is not necessarily the live wire. In the case of a fault, the neutral wire or the ground wire may be charged, but the live wire may not be charged. Therefore, it is recommended that non-professional people seek help from professional electricians when they encounter such problems, so as to ensure the safety of personal facilities and the smooth resolution of problems.
In addition to being mainly used to check low-voltage electrical equipment and lines, the low-voltage electroscope pen can also distinguish between phase line and neutral line, alternating current and direct current, and the level of voltage.
When distinguishing the neutral line and the live line, usually the neon bulb that glows is the live line, and the one that is not lit is the zero line; but pay attention when the neutral point is displaced, at this time, the zero line will also make the neon bulb glow;
When distinguishing between alternating current and direct current, when the alternating current passes through the neon bulb, both poles of the neon bulb emit light, and when the direct current passes through, only one electrode glows;
When used to judge the voltage level, when the neon bulb is dark red and slightly bright, the voltage is low; the neon bulb is yellowish red, and the voltage is high when the brightness is strong.
